The stm32l4 family had the very nice feature of programmable pull-up/pull-down on the various GPIO pins to be applied when in shutdown or standby. In standby mode, these configurations are not lost at wakeup (at least as I read the reference manual). Is it the case that these pull-ups/pull-downs continue to be applied until the pins are reconfigured ? Is there a "moment" when the pins float ? The reference manual is far from clear on this point, but it makes a difference whether I need an external pull-down.